Suspension of trolley-wires.



MJJELLINBK & J. F. DB TGVKROS.

SUSPENSION OI TROLLEY WIRES.

APPLICATION FILED 11211.26, 1910.

Patented July 23; 1912 2'51. 4

mvENToR's, MRRCELLJELUNEIK A du es fiscnm aflflvmos.

' J A torney.

the suspension wire at is supposed to astoo stiii for this purpose, While at the same "elare the 10' UNITED srhtrns PATENT OFFICE.

MARCELL JELLINEK AND JULES FISCHER DE iVARQS, 0F BUDAPEST, AUSTRIA- HUNGARY.

Specification of Letters Patent.

SUSPENSION OF TROLLEY-XVIEES.

Patented July 23, 1912.

Application filed April 26, 1910. Serial No. 557,833.

To all whom it concern:

Be it known that we, MAnonLL JELLXXEK and Jtmes FISCHER on Tvinos, subjects of the King of Hungary, both residing at Budapest, in the Empire of Austria-Hun. gary,'have invented a new and useful Inrprt enient in or Relating to the Suspension of Trolley-Wires; and we do hereby defollowing to be a full, clear, and exact description of the same.

lVhen trolley wire-s have been suspended roni supporting or carrier wires, it has con found necessary, in order to equalize 1e longitudinal expansion or length variations, occurring as a result of variations in temperature, to provide'weights or tension springs on the ends of the trolley sections, and to providebetween the trolley wire and the carrier wire a connection capable of yielding in the longitudinal direction of the trolley wire. It has been proposed to effect a yielding connection of this kind by connecting the suspension wires 4, which connect the trolley wire 1 (see Figure 1) with the carrier wire 2, to clamps 3 or the like on' the trolley Wire, the suspension wire 4, leading from the one trolley wire clamp 3 to the other, passing over a roller 5 attached to the carrier wire 2. In the event of a longitudinal displacement of the trolley wire,

sume the new position indicated in dotted lines, by the wire 4 moving over the roller 5, which, however, could take'place only by using comparatively expensive twisted cables, which arenot durable, as plain wires of the required strength would prove to be time all parts and their fitting would have to be very exact. Moreover, the suspension wire would thereby undergo a lengthening, since the increase in length of the one branch (in Fig. l the right hand one) is greater than the shortening of the other branch (left haul one in Fig. 1) so that simultaneously with a longitudinal displacement of the attaching points 3 a variation in the height. would take place.

Accoi to the present invention the arrangenien is made in such a manner that the trolley wire holders or supports or the like are so connected with the carrier wire by means of suspension wires, bands or the like, in at least two points which are as restead of Wires,

mote from each other as possible, that while insuring their horizontal position. any longitudinal displacement thereof is prevented as much as possible, the trolley wire holders or supports loosely embracing, surrounding or supporting the trolley wire, thereby enabling its longitudinal displacement therein or thereon.

Fig. 1 illustrates a known method of suspending the trolley wire; Fig; 2, several methods according to the present invention, for holding the trolley supports in fixed horizontal position; Figs. 3 and 5, a pre ferredmethod of suspensions; Fig. i, a suspension in which bands are employed, in and Fig. 6, a detail of a clamp for holding the trolley wire and the supporting wire;

The improved arrangement is diagrammatically shown in Fig. 2 of the drawing The supports 3, 3 embrace or support the trolley wire 1 loosely, so as to enable its easy longitudinal,displacement within the holders while preventing it from dropping out or disengaging therefrom. The holders, however, are so firmly connected to the carrier wire 2 as to be prevented from moving in longitudinal direction. To this end the holders may be connected to the carrier Wire, as shown at -aby means of two parallel suspension wires 4, l", or as shown at 5.-', by means of two diverging suspension wires 4, l. Instead of two Wires, an appropriately wider band can be used, as indicated at -o-, in Fig. 2. The preterable mode of attachment is shown in 8 and 5. According to Fig. 5, the trolley wire 1 has the 'nsual cross section, and is clamped, in a known manner, at the suspen .sion points between two clamping jaws G firmly clamped whereas the trolley wire iis held loosely by the jaws and can be easily displaced therein in longitudinal direction. According to Fig. 6 the clamp aw 6 1s provided with a rib 10 and the suspension l wire 4: passes between the rib l0 and the bolts 8.

For the attachment of the two ends 9, 9 of the suspension wire, any known securing means, such as for instance clamping disks compressed by means of a bolt, may be used.

With this mode of carrying out the invention, the fitting or mounting of the whole system can be effected in a ready and simple manner.

According to Fig. 4: the clamp is suspended by means of strips 4", 4 to the carrier wire, said strips being attached to. eyes of the clamp.

What we claim is 1-- '1. 'In a catenary trolley wire suspension system, a messenger cable, wire clamps susclamps, a groove .for maintaining sta'ntially, constant tension.

pended from said messenger cable, means to assure a horizontal position and to prevent longitudinal dis lacement of said wire trolley wire, said clamps permitting longitudinal trolley wire in the wire clamps, and means the trolley wire at a sub- Copies of this patent may be obtained for five .centsteach, by addressin Washington, D, G.

displacement of the 2. In acatenary trolley wire suspension system, a messenger cable, wire clamps, hangers suspending said wireclainps on the 30 messenger cable and attached at two longitudinally'distant points of the wire clamp and diverging from each other upwardly, a grooved trolley wire, said clamps permitting longitudinal displacement; of the trolley 3 wire in the wire clamps, and means for maintaining the trolley wire at a-substantially constant tension.

4 3. In a'catenary trolley wire suspension, a messenger cable, a grooved trolley wire, 4 /a wire clamp composed of two jaws ioosely. holding said trolley wire, a hanger, wire secured at both of its ends to said I ger cable andclamped at its midd' between the jaws of said wire clamp In testimony whereof, we have si names to this specification in the p of two subscribing witnesses MARGELL JELLINEK. FISCHER on TOVABUS.

Witnesses 1 HUGH KnMnNY, CHARLES SCHUSTER.

Commissioner of PatentlQj 

